问题
选择题
We ______ such great success without your efforts. Thanks a lot.
A．shouldn’t have accomplished
B．couldn’t have accomplished
C．were unable to accomplished
D．mustn’t have accomplished
答案
答案：B
考查虚拟语气。句意：没有你的努力，我们不可能取得如此大的成功。谢谢你。“could+have+done”表示对过去事情的假设，意思是本来能够做某事而没有做。故选B。